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This study investigates the structural behavior of reinforced concrete beams with circular openings under fixed-end conditions.

June 13, 2026Scientific ReportsOpen Access

Nonlinear behavior of fixed-end RC beams with circular openings based on experimental and finite element analysis

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Randomized trial investigates structural behavior of RC beams with circular openings, suggesting design improvements.

This study investigates the structural behavior of reinforced concrete beams with circular openings under fixed-end conditions.
Experimental testing of full-scale beam specimens under four-point bending.
Development of nonlinear finite element models using ABAQUS software.
Introduction of openings at 20%, 40%, and 60% of beam height in the bending region.
Openings exceeding 40% of beam height significantly reduce ductility and cause sudden load drops.
Concrete section around openings is critical for load transfer and bond performance when openings exceed 20%.
Numerical results closely align with experimental findings, indicating reliable modeling.

Aslanbay et al. (2026) studied this question.

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